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In the C++ programming language, the assignment operator, =, is the operator used for assignment.Like most other operators in C++, it can be overloaded.. The copy assignment operator, often just called the "assignment operator", is a special case of assignment operator where the source (right-hand side) and destination (left-hand side) are of the same class type.
The second most commonly used notation is [1] x := expr (originally ALGOL 1958, popularised by Pascal). [2] Many other notations are also in use. In some languages, the symbol used is regarded as an operator (meaning that the assignment statement as a whole returns a value). Other languages define assignment as a statement (meaning that it ...
Associativity is only needed when the operators in an expression have the same precedence. Usually + and -have the same precedence. Consider the expression 7 - 4 + 2. The result could be either (7 - 4) + 2 = 5 or 7 - (4 + 2) = 1. The former result corresponds to the case when + and -are left-associative, the latter to when + and -are right ...
Augmented assignment (or compound assignment) is the name given to certain assignment operators in certain programming languages (especially those derived from C).An augmented assignment is generally used to replace a statement where an operator takes a variable as one of its arguments and then assigns the result back to the same variable.
The semantics of an operator may significantly differ from that of a normal function. For reference, addition is evaluated like a normal function. For example, x + y can be equivalent to a function add(x, y) in that the arguments are evaluated and then the functional behavior is applied. However, assignment is different.
The prototype column should be corrected, then it would be very usefull. For example, a prototype for an assignment operator that returns a type R!=T, where T is the type of the calling object is a wrong prototype. The build-in assignment operator returns a reference to the left-hand side operator, which has particular effects.
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Regarding the anatomy of assignment operator: Keep in mind that the referenced paper show a faulty assignment operator. If the TSuperFoo assignment throws exception you willl have created objects with pointers on stack bar1 and bar2 that is never deleted.